Abstract
The basic nitrogen content in Rasco crude oil and light gas oil (LGO), heavy gas oil (HGO) and in naphtha and kerosene produced from Rasco crude oil a 50% Sarir/50% Mesla crude blend; a feedstock for Ras Lanuf refinery was determined; Rasco crude oil, LGO and HGO contain 47, 13 and 88 ppm nitrogen respectively whilst naphtha and kerosene contain zero ppm basic nitrogen. Some of the physical and the chemical properties of Rasco crude oil and its LGO, HGO and residue were determined, followed by extraction of basic nitrogen compounds from Rasco crude oil and from its LGO, HGO and residue by hydrochloric acid extraction method. Separation and identification of these types of compounds was attained by a GC-MS technique and the identified basic nitrogen compounds are quinoline, isoquinoline and acridine derivatives and the identified non basic nitrogen compounds are the indole derivatives.